package com.atguigu.cloud.mygateway;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @Author: huahua
 * @Date: 2024/6/12 0012
 * @Time: 20:26
 * @Description: 自定义全局Filter过滤器
 */
@Component
@Slf4j
public class MyGlobalFilter implements GlobalFilter , Ordered{

    //开始调用方法的时间
    public static final String BEGIN_VISIT_TIME = "begin_visit_time";



    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.记录访问接口的开始时间
        exchange.getAttributes().put(BEGIN_VISIT_TIME,System.currentTimeMillis());


        //返回统计的各个结果给后台
        return chain.filter(exchange).then(Mono.fromRunnable(()->{
            Long beginVisitTime = exchange.getAttribute(BEGIN_VISIT_TIME);
            if(beginVisitTime != null){
                log.info("访问接口主机: " + exchange.getRequest().getURI().getHost());
                log.info("访问接口端口: " + exchange.getRequest().getURI().getPort());
                log.info("访问接口URL: " + exchange.getRequest().getURI().getPath());
                log.info("访问接口URL后面的参数: " + exchange.getRequest().getURI().getRawQuery());
                log.info("访问接口的时长" + (System.currentTimeMillis() - beginVisitTime) + "毫秒");
                log.info("================分割线===============");
                System.out.println();

            }
        }));
    }


    //优先级
    @Override
    public int getOrder() {
        return 0;
    }
}
